tls49
Test Equipment vs The Ear
It all starts with designers doing prototypes using the laws of electronics and measuring, getting the best they can, then it’s listened to if they’re audiophiles.
Then if needs be, to make changes to the sound, they make changes to measurements or even the circuit, design, and then it’s re-measured to see if nothings wrong and if it sounds better, good, if not do more of the same.
But no designer in their right mind would change anything from the original and not re-measure to see if all is still fine.
Cheers George